Radiation transfer in plant canopies - Transmission of direct solar radiation and the role of leaf orientation

Understanding the details of the interaction between the radiation field and plant structures is important climatically because of the influence of vegetation on the surface water and energy balance, but also biologically, since solar radiation provides the energy necessary for photosynthesis. The problem is complex because of the extreme variety of vegetation forms in space and time, as well as within and across plant species. This one-dimensional vertical multilayer model describes the transfer of direct solar radiation through a leaf canopy, accounting explicitly for the vertical inhomogeneities of a plant stand and leaf orientation, as well as heliotropic plant behavior. This model reproduces observational results on homogeneous canopies, but it is also well adapted to describe vertically inhomogeneous canopies. Some of the implications of leaf orientation and plant structure as far as light collection is concerned are briefly reviewed.

[1]  D. Watson.  Comparative Physiological Studies on the Growth of Field Crops: I. Variation in Net Assimilation Rate and Leaf Area between Species and Varieties, and within and between Years , 1947 .

[2]  M. Monsi.  Uber den Lichtfaktor in den Pflanzengesellschaften und seine Bedeutung fur die Stoffproduktion , 1953 .

[3]  J. Wilson,et al.  INCLINED POINT QUADRATS , 1960 .

[4]  C. T. Wit.  Photosynthesis of leaf canopies , 1965 .

[5]  Margaret C. Anderson.  Stand Structure and Light Penetration. II. A Theoretical Analysis , 1966 .

[6]  R. H. Shaw,et al.  Light Distribution in Field Soybean Canopies1 , 1967 .

[7]  I. R. Cowan.  The Interception and Absorption of Radiation in Plant Stands , 1968 .

[8]  William A. Williams,et al.  Quantitative Descriptions of Foliage Display and Light Absorption in Field Communities of Corn Plants 1 , 1968 .

[9]  Margaret C. Anderson.  A comparison of two theories of scattering of radiation in crops , 1969 .

[10]  William E. Reifsnyder,et al.  Spatial and temporal distribution of solar radiation beneath forest canopies , 1970 .

[11]  T. Nilson.  A theoretical analysis of the frequency of gaps in plant stands , 1971 .

[12]  Solar radiation variability on the floor of a pine plantation , 1971 .

[13]  A.R.G. Lang,et al.  Leaf orientation of a cotton plant , 1973 .

[14]  A.R.G. Lang,et al.  Quantitative measures of leaf orientation and heliotropic response in sunflower, bean, pepper and cucumber , 1974 .

[15]  Raoul Lemeur,et al.  A critical review of light models for estimating the shortwave radiation regime of plant canopies , 1974 .

[16]  J. Norman,et al.  Photosynthesis in Sitka spruce (Picea sitchensis (Bong.) Carr.). V. Radiation penetration theory and a test case , 1975 .

[17]  A.R.G. Lang,et al.  Description of leaf orientation and heliotropic response of sunflower using directional statistics , 1975 .

[18]  A. Lang,et al.  Sunlit areas and angular distributions of sunflower leaves for plants in single and multiple rows , 1976 .

[19]  A. Lang,et al.  Movements of sunflower leaves over a 24-h period , 1976 .

[20]  D. J. Fitter,et al.  STAND STRUCTURE AND LIGHT PENETRATION , 1980 .

[21]  J. Ehleringer,et al.  Solar tracking by plants. , 1980, Science.

[22]  J. Ross.  The radiation regime and architecture of plant stands , 1981, Tasks for vegetation sciences 3.

[23]  N. Goel,et al.  Inversion of vegetation canopy reflectance models for estimating agronomic variables. I. Problem definition and initial results using the Suits model , 1983 .

[24]  Daniel S. Kimes,et al.  Diurnal variations of vegetation canopy structure , 1983 .

[25]  R. Dickinson.  Land Surface Processes and Climate—Surface Albedos and Energy Balance , 1983 .

[26]  Paul J. Kramer,et al.  Water Relations of Plants , 1983 .

[27]  D. Kimes.  Modeling the directional reflectance from complete homogeneous vegetation canopies with various leaf-orientation distributions , 1984 .

[28]  The Cambridge Encyclopedia of Life Sciences , 1985 .

[29]  N. Goel,et al.  Two-Dimensional Leaf Orientation Distributions , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[30]  J. Norman,et al.  Crop structure and the penetration of direct sunlight , 1985 .

[31]  P. Sellers.  Canopy reflectance, photosynthesis and transpiration , 1985 .

[32]  S. Gerstl,et al.  Coupled atmosphere/canopy model for remote sensing of plant reflectance features. , 1985, Applied optics.

[33]  Piers J. Sellers,et al.  Inferring hemispherical reflectance of the earth's surface for global energy budgets from remotely sensed nadir or directional radiance values , 1985 .

[34]  J. Norman,et al.  Modeling the Radiant Transfers of Sparse Vegetation Canopies , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[35]  N. Goel,et al.  Evaluation of a Canopy Reflectance Model for LAI Estimation through Its Inversion , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[36]  M. Nuñez.  Modelling daily global radiation at the forest floor , 1985 .

[37]  A. Lang.  Estimation of leaf area index from transmission of direct sunlight in discontinuous canopies , 1986 .

[38]  G. Campbell.  Extinction coefficients for radiation in plant canopies calculated using an ellipsoidal inclination angle distribution , 1986 .

[39]  G. Péch.  MOBILE SAMPLING OF SOLAR RADIATION UNDER CONIFERS , 1986 .

[40]  T. Brakke,et al.  Penetration of sunlight into a canopy: Explicit models based on vertical and horizontal leaf projections , 1986 .

[41]  R. Dickinson,et al.  Albedos of homogeneous semi-infinite canopies: comparison of two- stream analytic and numerical solutions. , 1987 .

[42]  J. Monteith,et al.  Principles of Environmental Physics , 2014 .